Mr Mangione was formally charged on Monday evening with forgery, carrying firearms without a licence, tampering with records or identification, possessing instruments of crime and providing a false identification to police.

Pete Weeks, a district attorney in Pennsylvania’s Blair County, said that homicide charges from New York would be filed “tonight or tomorrow” or in the “near future”.

Mr Mangione stopped co-operating after he was detained, officials said.

Handcuffed at the wrists and ankles, he appeared in court on Monday in Hollidaysburg, Pennsylvania.

Mr Mangione, who was wearing jeans and a dark blue jersey, appeared calm during the hearing, occasionally looking around at those present, including the media.

New York City investigators used one of the world’s largest digital surveillance systems, police dogs, drones and divers in a Central Park lake in the search for clues before the manhunt spread to neighbouring states.

But it was ultimately a McDonald’s customer that recognised the suspect from media coverage and alerted an employee, who tipped off the police.

According to authorities in Pennsylvania, officers were called to a report of a “suspicious male” who resembled the suspect in Thompson’s murder.

When police arrived at the fast-food restaurant, Mr Mangione showed them a fake New Jersey driver’s licence with the name Mark Rosario, said court papers.

He “became quiet and started to shake” when an officer asked if he had been to New York recently, the criminal complaint adds.

When he was told he would be arrested if he lied about his name, he gave his real name, Luigi Mangione, according to the court papers.

Asked why he lied, he told officers that “I clearly shouldn’t have”, said the court papers.

A search of his backpack uncovered a 3D-printed pistol, a 3D-printed silencer and a loaded magazine with six rounds of 9mm ammunition.

Prosecutors said he was also carrying a US passport and $10,000 cash, $2,000 of it in foreign currency, though Mr Mangione disputed the amount in court.

Investigators revealed that finding him was a complete surprise, as they did not have his name on a list of suspects before Monday.

Earlier in the day, New York Police Commissioner Jessica Tisch said the weapon and suppressor seized by investigators from the suspect were “both consistent with the weapon used in the murder”.

Once any charges in New York are filed, Mr Mangione will be presented with the option of waiving his extradition or contesting it.

If he waives it, he will immediately be made available to New York authorities. If he contests it, the process could take between 30 and 45 days.

A three-page handwritten document found on Mr Mangione’s possession suggested he harboured “ill will towards corporate America”, said New York Chief of Detectives Joseph Kenny.

Mr Kenny said that Mr Mangione was born and raised in Maryland and has ties to San Francisco, California. His last known address was in Honolulu, Hawaii.

TrueCar, a website for car buyers, confirmed that he had been employed there but left in 2023.